Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-01-24
2008-09-23
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S800000, C318S140000, C701S101000, C701S022000
Reexamination Certificate
active
07427849
ABSTRACT:
The present invention provides a controller and driving apparatus for an electric vehicle, which enables a motor to steadily output torque even when there is an increase in the rotation speed of an internal combustion engine that drives a generator. A motor control unit includes a voltage/current command generator F10. The voltage/current command generator F10includes a base command determination unit, which determines a base command value for the output voltage of the generator and base command values for d- and q-axis currents that drive an AC motor, and power generation operating point change means, which changes the command values that are output from the base command determination unit. When an operating point of the generator approaches an unstable region where the generator unsteadily operates, the power generation operating point change means changes the generator's operating point to position it within a stable region.
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European Search Report dated Jun. 1, 2007 (Nine (9) pages).
Akaishi Shigeru
Iino Hisao
Kaneko Satoru
Katsuhama Kenta
Yamamoto Tatsuyuki
Crowell & Moring LLP
Dinh Thai
Donovan Lincoln
Hitachi , Ltd.
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